| /* |
| * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_REMOTE_RATE_CONTROL_H_ |
| #define WEBRTC_MODULES_RTP_RTCP_SOURCE_REMOTE_RATE_CONTROL_H_ |
| |
| #include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h" |
| |
| namespace webrtc { |
| |
| class RemoteRateControl { |
| public: |
| RemoteRateControl(); |
| ~RemoteRateControl() {} |
| |
| void Reset(); |
| |
| // Returns true if there is a valid estimate of the incoming bitrate, false |
| // otherwise. |
| bool ValidEstimate() const; |
| |
| // Returns true if the bitrate estimate hasn't been changed for more than |
| // an RTT, or if the incoming_bitrate is more than 5% above the current |
| // estimate. Should be used to decide if we should reduce the rate further |
| // when over-using. |
| bool TimeToReduceFurther(int64_t time_now, |
| unsigned int incoming_bitrate) const; |
| |
| int32_t SetConfiguredBitRates(uint32_t min_bit_rate, uint32_t max_bit_rate); |
| uint32_t LatestEstimate() const; |
| uint32_t UpdateBandwidthEstimate(int64_t now_ms); |
| void SetRtt(unsigned int rtt); |
| RateControlRegion Update(const RateControlInput* input, int64_t now_ms); |
| |
| private: |
| uint32_t ChangeBitRate(uint32_t current_bit_rate, |
| uint32_t incoming_bit_rate, |
| double delay_factor, |
| int64_t now_ms); |
| double RateIncreaseFactor(int64_t now_ms, |
| int64_t last_ms, |
| uint32_t reaction_time_ms, |
| double noise_var) const; |
| void UpdateChangePeriod(int64_t now_ms); |
| void UpdateMaxBitRateEstimate(float incoming_bit_rate_kbps); |
| void ChangeState(const RateControlInput& input, int64_t now_ms); |
| void ChangeState(RateControlState new_state); |
| void ChangeRegion(RateControlRegion region); |
| static void StateStr(RateControlState state, char* str); |
| static void StateStr(BandwidthUsage state, char* str); |
| |
| uint32_t min_configured_bit_rate_; |
| uint32_t max_configured_bit_rate_; |
| uint32_t current_bit_rate_; |
| uint32_t max_hold_rate_; |
| float avg_max_bit_rate_; |
| float var_max_bit_rate_; |
| RateControlState rate_control_state_; |
| RateControlState came_from_state_; |
| RateControlRegion rate_control_region_; |
| int64_t last_bit_rate_change_; |
| RateControlInput current_input_; |
| bool updated_; |
| int64_t time_first_incoming_estimate_; |
| bool initialized_bit_rate_; |
| float avg_change_period_; |
| int64_t last_change_ms_; |
| float beta_; |
| unsigned int rtt_; |
| }; |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_REMOTE_RATE_CONTROL_H_ |